How to through a great High School party?

[Fe]

Okay so I decided since it was the summer before senior year I would throw a bonfire. This bonfire consisted of just inviting about 20 of my close friends from different schools just so we can all have fun and so everyone can meet other people. So I then invited one girl who openly discussed the date of the bonfire which made another girl curious and asked me what it was about. I told her and I politely invited her, and I told her she can bring a friend or a few if she wanted to, so she told me she would just bring her boyfriend. Tonight I heard from one of my friends that her brother was told about the bonfire from a friend who heard it on twitter. Her brother going to be a sophomore this year. So yeaa word spread like wildfire because these two girls posted "crazy party on this day, this place, this time, etc" and so now I dont know what to do. Im excited for the party, especially since its such a Project X moment, but its at a public beach, and I'm nervous about people bringing illegal substances. Also How can I entertain all of these people? Do I bring a bunch of food/drinks? Music? Im excited about the idea but im just nervous about the night portion of it. But pleaseee help! I dont want to cancel it when its tomorrow and I just found out about this whole situation. Thank you so much!(:
**Throw

Sorry its almost 1:30 am here -.-